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Preparation method of heavy metal ion nano sensitive material

A technology for heavy metal ions and sensitive materials, which is applied in the field of preparation of heavy metal ion nano-sensitive materials, to achieve excellent adsorption and electrocatalytic performance, high yield, and the effect of facilitating electron transport

Inactive Publication Date: 2020-03-13
HUAIBEI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its detection sensitivity needs to be further improved, and how to realize high-sensitivity electrochemical detection of heavy metals in water environment is still facing great challenges.
At present, for the electrochemical application of nanomaterials, it is difficult to obtain nanomaterials with large specific surface area and good catalytic performance, and its controllable preparation is also a major difficulty in research.

Method used

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  • Preparation method of heavy metal ion nano sensitive material
  • Preparation method of heavy metal ion nano sensitive material
  • Preparation method of heavy metal ion nano sensitive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a ZnO / Co 3 o 4 The preparation method of nanomaterials specifically includes:

[0035] (1) Weigh 0.11g of zinc acetate, 0.25g of cobalt acetate and 0.32g of polyvinylpyrrolidone, put them into a clean beaker, add 15mL each of deionized water and glycerin, and then fully ultrasonically and magnetically stir to form a purple-red transparent solution;

[0036] (2) Transfer the solution in step 1) to a 50mL hydrothermal reactor, set the constant temperature at 140°C, and keep it for 5 hours until the reaction is complete;

[0037] (3) Cool for 10 hours after the reaction is complete, then centrifuge and wash it with deionized water and absolute ethanol for 5 times each, and place the obtained white precipitate in a vacuum drying oven at 60°C for 12 hours to obtain a white powder of the precursor;

[0038] (4) Place the obtained white precursor powder in a muffle furnace for calcination at 350 °C for 1 h with a heating rate of 1 °C / min to obtain th...

Embodiment 2

[0041] As a comparative example of Example 1, (1) take by weighing 0.11g zinc acetate, 0.25g cobalt acetate and 0.32g polyvinylpyrrolidone, put into a clean beaker, add deionized water and glycerin each 15mL fully ultrasonic and Magnetic stirring into a purple-red transparent solution;

[0042] (2) Transfer the solution in step 1) to a 50mL hydrothermal reactor, set a constant temperature of 120°C, and keep it for 10h until the reaction is complete;

[0043](3) Cool for 10 hours after the reaction is complete, then centrifuge and wash it with deionized water and absolute ethanol for 5 times each, and place the obtained white precipitate in a vacuum drying oven at 60°C for 12 hours to obtain a white powder of the precursor;

[0044] (4) Place the obtained white precursor powder in a muffle furnace for calcination at 400 °C for 1 h, and the heating rate is 1 °C / min to obtain the final product of black powder.

[0045] After the characterization as in Example 1, the obtained nan...

Embodiment 3

[0047] As a comparative example of Example 1, (1) take by weighing 0.11g zinc acetate, 0.25g cobalt acetate and 0.32g polyvinylpyrrolidone, put into a clean beaker, add deionized water and glycerin each 15mL fully ultrasonic and Magnetic stirring into a purple-red transparent solution;

[0048] (2) Transfer the solution in step 1) to a 50 mL hydrothermal reactor, set the constant temperature at 100 °C, and keep it for 12 h until the reaction is complete;

[0049] (3) Cool for 8 h after the reaction is complete, then centrifuge and wash it with deionized water and absolute ethanol five times each, and place the obtained white precipitate in a vacuum drying oven at 60°C for 12 h to obtain a white powder of the precursor;

[0050] (4) Place the obtained white precursor powder in a muffle furnace for calcination at 400 °C for 1 h, and the heating rate is 1 °C / min to obtain the final product of black powder.

[0051] After the characterization as in Example 1, the obtained nanomat...

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Abstract

The invention discloses a preparation method of a heavy metal ion nano sensitive material. The preparation method comprises the following steps: by using zinc acetate and cobalt acetate as metal raw materials and water and glycerol as solvents, adding a surfactant, and preparing a ZnO / Co3O4 nano composite material by a simple hydrothermal method. The materials are low in price and easy to obtain;the obtained precursor thin-layer tubular nano-structure is regulated and controlled by adding the surfactant; the specific surface area obtained after calcination is the largest and the tubular structure is beneficial to electron transport; adsorption and electrocatalytic performance is excellent; preparation conditions are simple and controllable; and the obtained ZnO / Co3O4 nano-composite material has a thin-layer tubular porous hierarchical structure, and is high in yield and low in cost. Based on electrochemical response of the material to heavy metal ions in a water environment, the nano-material electrode with a large specific surface area and good catalytic performance is obtained, the sensitivity is remarkably improved, efficient detection of heavy metal ion such as mercury and thelike in a water environment is achieved, the hydrothermal preparation method of the precursor is simple, raw materials are easy to obtain, operation is quick and easy, the temperature required for high-temperature calcination is low, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a heavy metal ion nano-sensitive material, which belongs to the technical field of nano-electrochemical analysis. Background technique [0002] Heavy metal ions such as lead (Pb), copper (Cu), mercury (Hg), and chromium (Cr) enter the human body through the food chain cycle, and are non-metabolizable and increasingly enriched in the human body, bringing great hidden dangers to human health. Among them, mercury ion (Hg(II)) is a typical divalent heavy metal ion. After it is enriched in the human body, it will cause irreversible damage to the human nervous system, blood circulation system, kidney, and reproductive system. The impact of blood lead on the body and intelligence of children is more serious than that of adults. There are many ways to be exposed to heavy metal pollution, such as the atmosphere, soil, food, drinking water, decorative materials, daily necessities, etc. Although the content of he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/416C01G51/04C01G9/02B82Y30/00
CPCG01N27/4166C01G9/02C01G51/04B82Y30/00C01P2004/82C01P2002/72C01P2004/03C01P2004/22C01P2004/30
Inventor 李珊珊程兴亮张永兴李素文
Owner HUAIBEI NORMAL UNIVERSITY